Functional ** only ** the Republic of Guatemala ID is a simple and free application, its functionality is to give the user the name of the phone company you are calling. The idea of ​​the application identifier came from Guatemala than 3 phone companies operate, CLARO, TIGO Movistar. The 3 companies offer free calls to numbers in the same company. For example you have a phone plan with CLEAR, you can make free calls to other numbers CLARO but as you know if the number you are calling is CLEAR.